(19)
(11) EP 1 260 733 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.07.2009 Bulletin 2009/28

(43) Date of publication A2:
27.11.2002 Bulletin 2002/48

(21) Application number: 02008945.4

(22) Date of filing: 22.04.2002
(51) International Patent Classification (IPC): 
F16H 3/44(2006.01)
F16H 61/02(2006.01)
 F16H 37/04(2006.01)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 21.05.2001 JP 2001151287

(71) Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHA
Minato-ku, Tokyo (JP)

(72) Inventors:
  • Kumagai, Yorinori
    Wako-shi, Saitama (JP)
  • Takahashi, Tsukasa
    Wako-shi, Saitama (JP)
  • Naraki, Tetsuo
    Wako-shi, Saitama (JP)

(74) Representative: Prechtel, Jörg et al
Weickmann & Weickmann Patentanwälte Postfach 86 08 20
81635 München
81635 München (DE)

   


(54) Automotive automatic transmission


(57) An automatic transmission has: a primary transmission mechanism including: an input shaft; a planetary gear set having a sun gear, planetary gears and a ring gear, each being a helical gear, the ring gear and sun gear being respectively connected to the input shaft and to a stationary member via a one-way clutch, and a carrier for the planetary gears is connected to a primary output shaft; and an centrifugal clutch engaged/released the input shaft with/from the primary output shaft in correspondence with a centrifugal force by a weight and a thrust force by the helical gear; and a secondary transmission mechanism connected to the primary output shaft, for controlling a gear-shift into two or more speed-changed conditions. A multiplicity of change-speed gears is obtained by selectively combining the released and engaged states of the centrifugal clutch for each of the speed-changed conditions of the secondary transmission mechanism.







Search report